... makes the light to use in sea water freely. 3), High luminous efficiency, life-span reachs 50,000 hours.4), Built ... 45 degree celsius or the voltage is above 30V, the output current of built-in constant current driver will be shutdown ... normal, the lamp also work normal.6), Professional waterproof design and prevent seawater wires.7), Waterproof(IP68), Shake-proof, Energy-saving, Environment-friendly ...